---
title: "Calculating and Approving the Calc Summary"
slug: "calculating-and-approving-the-calc-summary"
tags: ["Approval", "Circuits", "PEI"]
updated: 2026-10-27T23:11:45Z
published: 2026-10-27T23:11:45Z
canonical: "ims-handbook.cenosco.com/calculating-and-approving-the-calc-summary"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ims-handbook.cenosco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Calculating and Approving the Calc Summary

The [Calc Summary](/v414/docs/the-calculation-summary) must be [calculated](/v414/docs/corrosion-rate-calculations-details) and **Final Approved**. This way the Schedule is credited, and a new [Corrosion Schedule](/v414/docs/defining-corrosion-schedules) is created with the new [NID](/v414/docs/next-inspection-date-nid-horserace).

To calculate the data:

- Click the *Calculate* button to calculate the NID.

![Graphical user interface, application  Description automatically generated](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/calculating-and-approving-the-calc-summary-image-8ctczwxp.png?sv=2026-02-06&spr=https&st=2026-10-28T13%3A38%3A53Z&se=2026-10-28T14%3A38%3A53Z&sr=c&sp=r&sig=EV889BLEUXTZKEFUVuFZVdh2nNsmXZnWPg24TbBNE4g%3D)

Click the Calculate button.

To Approve the Calc Summary:

- Click the *Approve* button to open the Approve section.

![Graphical user interface, application  Description automatically generated](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/calculating-and-approving-the-calc-summary-image-4qfvmygh.png?sv=2026-02-06&spr=https&st=2026-10-28T13%3A38%3A53Z&se=2026-10-28T14%3A38%3A53Z&sr=c&sp=r&sig=EV889BLEUXTZKEFUVuFZVdh2nNsmXZnWPg24TbBNE4g%3D)

Click the Approve button.

- Click **Approve** to Final Approve the Calc Summary. Note: This creates an inspection event for the MSET.

![](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/calculating-and-approving-the-calc-summary-image-dpgjnrp4.png?sv=2026-02-06&spr=https&st=2026-10-28T13%3A38%3A53Z&se=2026-10-28T14%3A38%3A53Z&sr=c&sp=r&sig=EV889BLEUXTZKEFUVuFZVdh2nNsmXZnWPg24TbBNE4g%3D)

Click **Approve**.

The Corrosion Schedule of the [Circuit](/v414/docs/pei-circuits) will be credited and a new NID will be set. The Inspection Event status will now show “Inspection Completed“. Also, if the Circuit is inherited to an RBI Component, the Final Approved Calc Summary will automatically be applied in the [RBI Analysis **Inspection History** tab](/v414/docs/software-step-5), to update the RBI LID.

> [!NOTE]
> Take Note
> 
> A [recalculation](/v414/docs/approving-corrosion-circuit-calculations#recalculating-circuits-recalculate) will require the Calc Summary to be Final Approved.
> 
> However, a recalculation WILL NOT impact the Circuit’s Last Inspection Date and therefore also not the RBI LID via the [RBI Inspection History](/v414/docs/software-step-5). The inspection date is recorded in the [Measurement Set](/v414/docs/managing-measurement-sets#completing-measurement-sets) itself via the Measurement Date and is not impacted by the recalculation date.

It is important to understand the difference between:

- [Crediting](/v414/docs/approving-corrosion-circuit-calculations#crediting-corrosion-schedules-insp-completed) a Corrosion Schedule ("Insp Completed"), and
- [Recalculating](/v414/docs/approving-corrosion-circuit-calculations#recalculating-circuits-recalculate) a Circuit ("Recalculate").

This is explained in more detail in [Approving Corrosion Circuit Calculations](/v414/docs/approving-corrosion-circuit-calculations).